Almost everything on Facebook — the posts in your timeline, the ads, and features like speech recognition and automatic image tagging — is driven by artificial intelligence (AI). And Facebook is just getting started. The social media company’s new personal helper, M, can help you make dinner reservations, buy things off Amazon, and even recommend anniversary gifts for your spouse. Behind the technology that powers M and other Facebook features is a special team led by Yann LeCun, an AI researcher and former New York University professor. Since LeCun joined Facebook in 2013, the company has opened AI laboratories in California and in Paris, France, where LeCun was born. LeCun has researched image recognition since the 1980s. He even helped revive an AI field of study called “deep learning,” which now powers…